Temperature rise of a dry-type transformer with quasi-3D coupled-field method

Chao Liu; Jiangjun Ruan; Wu Wen; Ruohan Gong; Caibo Liao

Temperature rise of a dry-type transformer with quasi-3D coupled-field method

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Author(s): Chao Liu ¹ ; Jiangjun Ruan ¹ ; Wu Wen ¹ ; Ruohan Gong ¹ ; Caibo Liao ²
- Affiliations: 1: School of Electrical Engineering, Wuhan University, Wuhan 430072, People's Republic of China ;
  2: Condition based Maintenance Center, Jiangsu Electric Power Company Research Institute, Nanjing 211100, People's Republic of China
Source: Volume 10, Issue 7, August 2016, p. 598 – 603
DOI: 10.1049/iet-epa.2015.0491 , Print ISSN 1751-8660, Online ISSN 1751-8679

Received 07/10/2015, Accepted 05/02/2016, Revised 11/01/2016, Published 01/08/2016

A quasi-3D coupled-field method is introduced and applied on a ventilated dry-type transformer to study temperature rise of windings in this study. A simplified 3D model was first established to calculate energy loss of core and velocity distribution in a plane above the lower yoke. Then two accurate 2D models were built up to figure out energy losses in the windings. With a combination of indirect and sequential coupling, energy losses of both windings and core were used as heat source, and velocities for both 2D models were applied as boundary condition for analysing fluid-thermal field. Final results of temperature rise were calculated with temperature rise of two 2D models. In the end, numerical results were compared with experimental data to prove the effectiveness of this method.

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Temperature rise of a dry-type transformer with quasi-3D coupled-field method

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